TWI386656B - Capacitance measurement circuit and method - Google Patents

Capacitance measurement circuit and method Download PDF

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Publication number
TWI386656B
TWI386656B TW98122437A TW98122437A TWI386656B TW I386656 B TWI386656 B TW I386656B TW 98122437 A TW98122437 A TW 98122437A TW 98122437 A TW98122437 A TW 98122437A TW I386656 B TWI386656 B TW I386656B
Authority
TW
Taiwan
Prior art keywords
method
measurement circuit
capacitance measurement
capacitance
circuit
Prior art date
Application number
TW98122437A
Other versions
TW201102668A (en
Inventor
he wei Huang
Chih Yuan Chang
Hui Hung Chang
Original Assignee
Novatek Microelectronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Novatek Microelectronics Corp filed Critical Novatek Microelectronics Corp
Priority to TW98122437A priority Critical patent/TWI386656B/en
Publication of TW201102668A publication Critical patent/TW201102668A/en
Application granted granted Critical
Publication of TWI386656B publication Critical patent/TWI386656B/en

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making or -braking
    • H03K17/94Electronic switching or gating, i.e. not by contact-making or -braking characterised by the way in which the control signal is generated
    • H03K17/96Touch switches
    • H03K17/962Capacitive touch switches
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2605Measuring capacitance
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K2217/00Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96Touch switches
    • H03K2217/9607Capacitive touch switches
    • H03K2217/96071Capacitive touch switches characterised by the detection principle
    • H03K2217/960725Charge-transfer
TW98122437A 2009-07-02 2009-07-02 Capacitance measurement circuit and method TWI386656B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW98122437A TWI386656B (en) 2009-07-02 2009-07-02 Capacitance measurement circuit and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW98122437A TWI386656B (en) 2009-07-02 2009-07-02 Capacitance measurement circuit and method
US12/639,484 US8415957B2 (en) 2009-07-02 2009-12-16 Capacitance measurement circuit and method

Publications (2)

Publication Number Publication Date
TW201102668A TW201102668A (en) 2011-01-16
TWI386656B true TWI386656B (en) 2013-02-21

Family

ID=43412276

Family Applications (1)

Application Number Title Priority Date Filing Date
TW98122437A TWI386656B (en) 2009-07-02 2009-07-02 Capacitance measurement circuit and method

Country Status (2)

Country Link
US (1) US8415957B2 (en)
TW (1) TWI386656B (en)

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Also Published As

Publication number Publication date
US8415957B2 (en) 2013-04-09
US20110001491A1 (en) 2011-01-06
TW201102668A (en) 2011-01-16

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